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Descripción
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| The behavior of vibrated fluids and, in particular, the surface or interfacial instabilities that commonly arise in these systems have been the subject of continued experimental and theoretical attention since Faraday?s seminal experiments in 1831. Both orientation and frequency are critical in determining the response of the fluid to excitation. Low frequencies are associated with sloshing while higher frequencies may generate Faraday waves or cross-waves, depending on whether the axis of vibration is perpendicular or parallel to the interface. In addition, high frequency vibrations are known to produce large scale reorientation of the fluid (vibroequilibria), an effect that becomes especially pronounced in the absence of gravity. We describe the results of investigations conducted at the ESA affiliated Spanish User Support and Operations Centre (E-USOC) on the effect of vibrations on fluid interfaces, particularly the interaction between Faraday waves, which arise in vertically vibrated systems, cross-waves, which are found in horizontally forced systems, and large scale reorientation (vibroequilibria). Ongoing ground experiments utilizing a dual-axis shaker configuration are described, including the effect on pattern formation of varying the two independent forcing frequencies, amplitudes, and phases. Theoretical results, based on the analysis of reduced models, and on numerical simulations, are then described and compared to experiment. Finally, the interest of a corresponding microgravity experiment is discussed and implications for fluid management strategies considered. | |
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Internacional
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Si |
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Nombre congreso
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39th Scientific Assembly of the Committee on Space Research (COSPAR) |
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Tipo de participación
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960 |
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Lugar del congreso
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Mysore, India |
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Revisores
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No |
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ISBN o ISSN
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11-1111-111-1 |
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DOI
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Fecha inicio congreso
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14/07/2012 |
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Fecha fin congreso
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22/07/2012 |
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Desde la página
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1 |
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Hasta la página
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1 |
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Título de las actas
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